Solving by factorising jko

8 Solving by factorising TVWO 3

What you need: - Textbook, writingbook, Tablet, Phone - Pen, pencil, Calculator


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Slide 1: Tekstslide
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In deze les zitten 37 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 35 min

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8 Solving by factorising TVWO 3

What you need: - Textbook, writingbook, Tablet, Phone - Pen, pencil, Calculator


Slide 1 - Tekstslide

                         Lesson goals
  • Solve equations with factorisation.
  • Factorize a difference of two squares.

Slide 2 - Tekstslide

A x B = 0
In this case A = 0 or B = 0

A quadratic equation that is not written in the form A x B = 0, can be solved by factorising.

Slide 3 - Tekstslide

Solve the following equations:
timer
6:00

Slide 4 - Tekstslide

a
A
x=0 or x=-4
B
x=0 or x=4
C
x=0 or x=-2
D
x=0 or x=2

Slide 5 - Quizvraag

b
A
x=0 or x=-3
B
x=0 or x=3
C
x=0 or x=-1/3
D
x=0 or x=1/3

Slide 6 - Quizvraag

c
A
x=0 or x=-2.5
B
x=0 or x=2.5
C
x=0 or x=-5
D
x=0 or x=5

Slide 7 - Quizvraag

d
A
x=3 or x=6
B
x=3 or x=-6
C
x=-3 or x=-6
D
x=-3 or x=6

Slide 8 - Quizvraag

e
A
x=7 or x=2
B
x=-7 or x=2
C
x=7 or x=-2
D
x=-7 or x=-2

Slide 9 - Quizvraag

f
A
x=3 or x=5
B
x=-3 or x=5
C
x=3 or x=-5
D
x=-3 or x=-5

Slide 10 - Quizvraag

Slide 11 - Tekstslide

timer
3:00

Slide 12 - Tekstslide

a
A
y=x221
B
y=x210x21
C
y=x2+10x21
D
y=x2+4x21

Slide 13 - Quizvraag

b
A
y=x29
B
y=x2+9
C
y=x26x+9
D
y=x23x+9

Slide 14 - Quizvraag

c
A
y=x214x49
B
y=x2+49+14x
C
y=x2+49x+49
D
y=14x2+x+49

Slide 15 - Quizvraag

d
A
y=x225
B
y=x2+25
C
y=x250x25
D
y=x2+50x+25

Slide 16 - Quizvraag

e
A
y=x2+4
B
y=x24
C
y=x28x4
D
y=x2+8x+4

Slide 17 - Quizvraag

f
A
y=x22x1
B
y=x2+1
C
y=x2
D
y=x21

Slide 18 - Quizvraag

Slide 19 - Tekstslide

Factorizing a difference of squares
x281=0
(x9)(x+9)=0
x9=0
x+9=0
or
x=9
x=9

Slide 20 - Tekstslide

Slide 21 - Tekstslide

a
A
x=-10
B
x=0 or x=10
C
x=0 or x=-10
D
x=10 or x=-10

Slide 22 - Quizvraag

b
A
x=0 or x=-9
B
x=9 or x=9
C
x=9 or x=-9
D
x=9

Slide 23 - Quizvraag

c
A
x=0 or x=-1
B
x=-1
C
x=1
D
x=1 or x=-1

Slide 24 - Quizvraag

d
A
x=4 or x = -4
B
x=0 or x = -4
C
x=4
D
x = -4

Slide 25 - Quizvraag

Slide 26 - Tekstslide

Try on your own
1, 2, 5 and 7
RULES:
  • In your writingbook
  • Use: Textbook


Extra excercise: in Teams
Challenge: zero flaws...
Homework: 64 utai 71

Slide 27 - Tekstslide

Slide 28 - Tekstslide

Write down the area of 
segments I, II and III
The area of the tiled path is
34m2.

Slide 29 - Tekstslide

How wide is the tiled path
A
34 m
B
-17m
C
17m
D
2m

Slide 30 - Quizvraag

x2+15x=34

Slide 31 - Tekstslide

x2+15x=34
x2+15x34=0

Slide 32 - Tekstslide

x2+15x=34
x2+15x34=0
(x2)(x+17)=0

Slide 33 - Tekstslide

x2+15x=34
x2+15x34=0
(x2)(x+17)=0
x2=0orx+17=0

Slide 34 - Tekstslide

x2+15x=34
x2+15x34=0
(x2)(x+17)=0
x2=0orx+17=0
x=2orx=17

Slide 35 - Tekstslide

so the answer is 2
x2+15x=34
x2+15x34=0
(x2)(x+17)=0
x2=0orx+17=0
x=2orx=17

Slide 36 - Tekstslide

                         Lesson goals
  • Solve equations with factorisation.
  • Factorize a difference of two squares.

Slide 37 - Tekstslide